@Joseph Vizhnitz Monsey and Vizhnitz Bnei Brak are not officially affiliated and never were. Several other branches, like Seret Vizhnitz, are similarly unaffiliated to either. It’s similar with Satmar Williamsburg and Satmar Kiryas Yoel.
There are no affiliations between Ner Yisroel Toronto, (the former) Ner Yisroel LA, and Ner Yisroel Baltimore either.